2003320121 has 16 divisors (see below), whose sum is σ = 2223426240. Its totient is φ = 1789777920.

The previous prime is 2003320097. The next prime is 2003320133. The reversal of 2003320121 is 1210233002.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2003320121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2003320096 and 2003320105.

It is not an unprimeable number, because it can be changed into a prime (2003320141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170525 + ... + 181893.

It is an arithmetic number, because the mean of its divisors is an integer number (138964140).

Almost surely, 2^2003320121 is an apocalyptic number.

It is an amenable number.

2003320121 is a deficient number, since it is larger than the sum of its proper divisors (220106119).

2003320121 is a wasteful number, since it uses less digits than its factorization.

2003320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11656.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2003320121 is about 44758.4642386220. The cubic root of 2003320121 is about 1260.6178461850.

Adding to 2003320121 its reverse (1210233002), we get a palindrome (3213553123).

The spelling of 2003320121 in words is "two billion, three million, three hundred twenty thousand, one hundred twenty-one".